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A convicted sex offender who lives in Evans has been on the run since Friday when he didn’t appear for his Boulder court hearing, and investigators say he may have recently acquired firearms and could be a threat to the community.

George Osonau Tiba, 48, was convicted on Friday of sexual assault stemming from a case that started earlier this year at a Boulder bar. Tiba was arrested in March after a woman reported she had been sexually assaulted and robbed in February by a man she met at the Walrus Saloon. After the two met, the woman said the man assaulted her at her home and later stole cash and other items. Police also said previously that there may be more victims who did not report assaults.

The Boulder Daily Camera reports that Tiba’s GPS ankle monitor battery died Friday morning and was not sending out signals. When Tiba did not appear in court on Friday, his attorney said she could not reach him. The Daily Camera also reports that the last location the monitor transmitted from was in Greeley.

Sgt. Pat Wyton with Boulder police on Wednesday said Boulder police have investigators specifically assigned to the case in an effort to capture Tiba.

Additionally, departments across Weld County have warned officers to be on the lookout for the man who the say could pose a threat to the public and may be in the Greeley area.

“We have been alerted to that, and all of our officers have been advised,” said Sgt. Susan West with Greeley police. “We are aware that he may be in the area.”

Likewise, Evans police spokesman Michael Yates said they have been in communication with other law enforcement agencies regarding Tiba and are continuing to work on the investigation.

“We are maintaining a level of alertness,” he said in a written statement.

Tiba is an African American male approximately 5-feet-11-inches tall. He last weighed 214 pounds and had black hair, brown eyes and some facial hair, according to a news release from Boulder police.

Tiba may be driving a black 2006 Chrysler 300 with Colorado license plate 372-WZW. He has been known to use the alias “Jojo George,” and he speaks with an accent and often tells people he is from Jamaica, police said. He is actually from Uganda. He has been known to be violent toward women, and has had protection orders filed against him in the past.

A no-bond warrant has been issued for his arrest. Anyone who sees Tiba or has any subsequent information is urged to call 911 immediately.